
Originally Posted by
vicious_cb
Id like to know how much twist rate affects velocity granted every other aspect of the barrels are equal.
For .223/5.56mm and 1:7" twist versus 1:9" twist it doesn't. There is no statistically significant difference in velocity between a 1:9" twist barrel and a 1:7" twist barrel of identical construction. I've chronographed more than 40 different AR-15 barrels and any difference in velocity between a 1:9" twist and a 1:7" twist is simply due to barrel to barrel variations; not the twist. You'll see as much variation between two identical barrels with the same twist as you will between otherwise identical barrels with a 1:7" twist versus a 1:9" twist.
Anyone claiming a generalized significant increase in velocity with a 1:9" twist over a 1:7" twist doesn't have the facts behind them and I challenge anyone making such a claim to post statistically significant data supporting their claim.
Last edited by Molon; 06-10-10 at 00:35.
All that is necessary for trolls to flourish, is for good men to do nothing.
Bookmarks